If sin θ - cos θ = 0, then the value of (sin 4 θ +cos 4 θ ) is

Question

Philoid · Accepted Answer

Given: sin θ – cos θ = 0

And we know, tan 45° = 1

So, tan θ = 1 = tan 45°

By comparing above equation, we get θ = 45°

Thus,

If sin θ - cos θ = 0, then the value of (sin4 θ +cos4θ) is